onion marmelade

[mousymouse]

I just love onions.
having mastered onion gravy, thanks to you ladies, I want to tackle onion marmelade. I only found a french recipe which involves cooking onions for 6 hours...
is there an easier way?
and can I store it or do I need to use it all up in one go?

I made an onion chutney type thing with balsamic vinegar and sugar, really easy to make, I got the recipe from the good food website, it lasted forever and was lovely in cheese sandwiches.

do you mean this one ? looks good and managable